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AR# 30098

Description

When I program a Spartan-3AN device and select "Program FPGA Only" in iMPACT, the ISF Flash is programmed instead of the FPGA. Configuration fails, depending on the mode pin setting. Configuration works only if the mode pins are set to the ISF Flash configuration mode (M[2:0] = "011"). For all other modes, configuration fails.

Solution

This is a known issue for 9.2.04i only. This problem is fixed in 10.1, and not present in earlier 9.2i service packs. The GUI gives the incorrect command to the programmer. If you look in the console, you will see the following:

// *** BATCH CMD : Program -p 1

It should look like this:

// *** BATCH CMD : Program -p 1 -prog -onlyFpga

You can work around this problem by running in batch mode with the correct command, shown above.

If the batch mode workaround is not feasible, you can revert to 9.2.03, which does not have this issue. To do this, you can either remove the Service Pack using the "Uninstall last Update" option. Start -> Programs -> Xilinx ISE 9.2i -> Accessories -> Uninstall last Update, or set up a separate lab install of the programming tools only with Service Pack 3 installed. The lab version of the tools can be installed, which will install only iMPACT instead of the full tool suite.